669469444673 has 8 divisors (see below), whose sum is σ = 708861652992. Its totient is φ = 630078531136.

The previous prime is 669469444661. The next prime is 669469444687. The reversal of 669469444673 is 376444964966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 669469444673 - 2¹⁰ = 669469443649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669469444073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865736 + ... + 1445142.

It is an arithmetic number, because the mean of its divisors is an integer number (88607706624).

Almost surely, 2^669469444673 is an apocalyptic number.

It is an amenable number.

669469444673 is a deficient number, since it is larger than the sum of its proper divisors (39392208319).

669469444673 is a wasteful number, since it uses less digits than its factorization.

669469444673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647391.

The product of its digits is 564350976, while the sum is 68.

The spelling of 669469444673 in words is "six hundred sixty-nine billion, four hundred sixty-nine million, four hundred forty-four thousand, six hundred seventy-three".